Tart

Part of speech: noun (n.)

A species of small open pie, or piece of pastry, containing jelly or conserve; a sort of fruit pie.

Part of speech: adjective (a.)

1. Sharp to the taste; acid; sour; as, a tart apple.

2. Fig.: Sharp; keen; severe; as, a tart reply; tart language; a tart rebuke. Why art thou tart, my brother Bunyan.